Home / 20,919.52-28,868.70-12,536.02

Finding the Fourth Proportional to 20,919.52, 28,868.70 and 12,536.02

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Solution

The fourth proportional to 20,919.52, 28,868.70 and 12,536.02 is: 17,299.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.52 : 28,868.70 = 12,536.02 : x
  2. Step 2: Convert to fraction form
    20,919.52/28,868.70 = 12,536.02/x
  3. Step 3: Cross multiply
    20,919.52x = 28,868.70 × 12,536.02
  4. Step 4: Simplify right side
    20,919.52x = 361,898,600.57
  5. Step 5: Solve for x
    x = 361,898,600.57/20,919.52
  6. Step 6: Final answer
    x = 17,299.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.